Van Stone Thermowell

The Ashcroft® Van Stone thermowell is used when pressure, high velocity and corrosive process media exist. Designed to mate between two existing flanges. Serving to isolate and protect, it also allows the sensing instrument to be removed without requiring process shut down. An ideal solution for ensuring system operation.

Key Features:

  • Wide selection of materials
  • Stamped with date code, material and heat numbers


  • Fits: 1" and 1 1/2" lap joint flanges
  • Bore size: .260", .385"

The Van Stone thermowell is ideal where safety and product integrity is essential:

Process Market:

  • Chemical and Petrochemical Plants
  • Water and Wastewater pressure Control
  • Material Test Report (MTR)
  • Hydrostatic Testing
  • Wake Frequency Analysis